Albert f



(No Model.)

A. F. ROCKWELL.

DOOR 0R ALARM BELL. No. 414,124. Patented 004'. 29, 1889.

.fll t E. Rac/aue ji 1Q) I 3513 [M -V 644041441 4 UNITED STATES "PATENTOFFICE.

ALBERT F. ROCKlVELL, OF BRIS"OL, CONNECTICUT, ASSIGNOR TO THE NEIVDEPARTURE BELL COMPANY, OF SAME PLACE.

0 DOOR OR ALARM BELL.

SPECIFICATION forming part of Letters Patent No. 414,124, dated October29, 1889.

Application filed June 26, I889.

T0 aZZ whom it may concern.-

Be it known that I, ALBERT F. ROCKWELL, of Bristol, in the county ofHartford and State of Connecticut, have invented certain new and usefulImprovements in Door or Alarm Bells, of which the following is aspecification, reference being had to the accompanying drawings.

My invention relates to that kind of doorbell or alarm-bell for bicyclesor other purposes that is provided with an alarm-movement having amainspring that Winds up and that operates by releasing the movement andpermitting it to run down and cause a clattering sound, like that of anelectric bell, as long as the pull upon the bell-cord or the release ofthe alarm-movement by any other means is continued.

My improvements consist in providing such a door bell or alarm-bell withmeans for winding it up by the pull of a bell-wire or other force, whichreleases and permits the alarmmovement to operate by the force of themainspring.

Heretofore in door bells, bicycle-bells, &c., of this class it has beennecessary occasionally to wind up the mainspring of the alarm mechanism,because in frequent use it will soon expend its force and thealarm-movement will run down. To obviate the necessity of specialwinding of the mainspring, I have by my invention, as stated, providedfor winding it automatically or by means of the same force whichreleases the alarm-movement and causes it to sound.

In the accompanying drawings, illustrating my invention, Figure 1 is atop view of the alarm mechanism with the bell and part of the frame ofthe alarm mechanism removed. Fig. 2 is a side elevation.

Referring to the letters upon the drawings, A indicates a suitable framecontaining an ordinary alarm mechanism B, of which C is the mainspring,secured at one end to the arbor D and at the other to the main wheel Eof the alarm-movement.

F indicates a lever pivoted to the main spring-arbor or to the frame insuch relation to the ratchet wheel G, which is fixed to the arbor, as tooperate the spring=pawl H, pivoted to the lever, and cause the main-Serial No. 315,629. (No model.)

spring to be wound up whenever the lever is tilted in the direction ofthe arrow.

II indicates another spring-pawl, which serves to retain the tension ofthe mainspring as it is wound in the usual manner.

I indicates another lever pivoted to the frame by means of a pivot-postK. This post is provided with a coiled spring L, secured to it at oneend and at the other secured to the frame at M. An arm N projects fromthe post K against some moving part of the alarm 111echanismfor example,in this in stance, the verge O. The coiled spring L tends to keep thepost K, the arm N, and lever I turned into the position shown in Fig. 1,so that the arm N forms a stop that bears against the verge and preventsthe alarm-movement from sounding.

X is a disk or plate to support the mechanism.

P indicates a wire cord or link, preferably a coil of wire, connectingthe free ends of the two levers, and Q indicates an ordinary pullbellwire. When a pull is exerted upon this wire, the levers will be movedsimultaneously in the direction of the pull, the arm N will be releasedfrom the verge, and the alarm will sound as long as the pull iscontinued, or at least until the mainspring has completely relaxeditself. At the same time that the arm N is released from the verge O thepawl upon the lever F will move the ratchet-wheel G part of arevolution, and, as that wheel is fixed to the mainspring arbor, themainspring will be wound up correspondingly. I thus provide for windingup the spring at the same time that I provide for releasing it.

In some cases it might happen that the mainspring would become entirelyWound up, and if a rigid connection were employed between the free endsof the levers it might happen that there would not be play enoughbetween the ratchet and pawl to permit the alarm-movement to be releasedby sufficient movement of lever I; but by employing an extensible oryielding connection between the ends of the two leverssuch, for example,as a eoil-spring or a rubber spring-it can never happen that theresistance to further Winding of the mainspring will prevent thealarmmovement from being released, because the pull upon the lever I,will always operate it sufticiently whether the lever F inoyes, ojnitspivot ornot.

As door-bells, bicycle-bells, and other species of call-bells oralarm-bells are usually run only momentarily, I find in practice thatthe ordinary force applied for ringing will ind up the mainspring, andthus keep the alarmmovenient ready to be sounded, and no special Windingis required. I thus secure a doorbell which is a perfect imitation of311G190."

tric bell, and which does not require batteries to be used and renewedor mainsprings to be specially wound up, but is always au'tomaticallyWound and kept ready for use.

Instead of a pull-Wire, any' other means of apply n Qr e to operate, thelev s. F will m' y' ourse. be mpl yed W thee depar ing f m thesubstance. 0;? my njv n ipni 0f eelir eei he" m he i m fer m rits theste and releasing the, alarm-move meehaniem or W n i g u the m h be ediee forma ytere t wi hout depart ng frm he ubsee 0, my en i n, the m tera t n be 1 tehelve W me haniiems siimul aneen' y opener one to rel afethe, alarm-nloyelnent'and the ot i W nd 1 t mreieepr na e, comb na on wth n. al rm-mere me t prov ded wi a' hein cpr n 'fi ir op rating it, ofa stop ifor normally engaging ith th mev men an pre nting ts it ration,mechanism f or njovi ng the stop, releasing the alarm-movement, andringing the bell the pull of the bell wire, and mechanism having teethe". i r

eplt pe-e be yeeae e' uxe tan wind t by the lever F to Wind up theinainspring,

and the pivot-post K, its spring L, and the arm N, arrangedsubstantially as and for the purpose set'forth.

The mbinet eniwith en a arm-m v ment havi lei me prins er opera in f etepfilr ermit e g gi g W 1.1 movement rrere i s e n-1 the lever eprative y eenn ted w t the ma nniei iebi'inat ge 'l rer leem eeted. w thth stop, so as to moye it and release. the, alarm m e en sm, and y dinee ne e meme ree ends. oi e levers, whereby t e lere t ma e perated W tout per tl his the ever themein p ng become fu l 1 .0mm .eeleste 'u a lyas. set forth.

11 esteem 9 all w i h I here heie n sebse t bed. my meme ALBER'I? 1r.oron- Witnesses:

EDWARD: D, Bee -ww .LL,- ETT e m

